Chair seat unit



FIG. 1 is a perspective view of a chair seat unit showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a front perspective view of a chair seat unit showing a second embodiment of my design;

FIG. 8 is a front elevational view of the second embodiment;

FIG. 9 is a side elevational view of the second embodiment, the opposite side being a mirror image thereof;

FIG. 10 is a rear elevational view of the second embodiment;

FIG. 11 is a bottom plan view of the second embodiment; and

FIG. 12 is a top plan view thereof. 

The ornamental design for a chair seat unit, as shown and described. 